HVAC
- Knock-ready, dated by permit
- 11,902
- Mail route: past a 14-year service life
- 450,079
- Systems with a known install date
- 73,661
- Houses open right now
- 1,574
Seattle, WA · King County
Your next Seattle install is already on this list.
We read Seattle's public building permits and 524,978 King County parcel records every night and turn them into a working list for local contractors — the homes you can quote before the system picks the date. Here's exactly what you'd be getting, as of August 23, 2026.
11,902homes where the permit proves the system is past due — knock-ready today
221,338HVAC permits read, back to 2002
166,170absentee-owned properties
What you'd be working in Seattle
Plumbing
- Mail route: past a 12-year service life
- 452,454
Roofing
- Watch list: past an 18-year roof life
- 445,085
- Roofs with a known install date
- 810
- Roofing permits open right now
- 27
Straight answer
Seattle publishes mechanical permits but not plumbing permits, so plumbing here is the aging tier only. HVAC has 221,338 permits back to 2002.
The routes worth a truck in Seattle
Homes past service life by ZIP. Run the density, not the whole county.
| ZIP | Aging HVAC | Aging plumbing |
|---|---|---|
| 98115 | 13,860 | 13,922 |
| 98042 | 13,090 | 13,120 |
| 98023 | 11,891 | 11,892 |
| 98052 | 11,347 | 11,382 |
| 98034 | 11,184 | 11,282 |
Every ZIP in King County is in the data, 197 of them with counts. Check yours below.
Check the ZIP you run
Live counts for any Seattle ZIP, no signup. Try 98115.
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